Harrow attachment.



MJA. JACKSON & J. A. BRISTOW. HARROW ATTACHMENT.

APPLICATION FILED MAY 15, 1909.

934,31 3, Patentd Sept. 14, 1909.

" under side the adjustable sup 'iortmg bar nourish s'ra rasrn rnnr oer-ion MERRIOTT A. JACKSON AND JOHN A. BRISTORV, 0F ATHENS, TEXAS.

HARROW ATTACHMENT.

EDSetJHS.

Application filed May 15 1 To ail whom it may concern.

Be it known that we, ivlnnnio'rr A. JACK" so); and JOHN A. Bius'row, citizens of the United States, residing at Athens, in the county of Henderson, State of Texas. have, invented a new and useful Harrow Attachment of which the foilowing is a specification.

Our'invention relates to attachments for supporting the teeth of barrows and particularly for supporting the teeth. of the class of barrows commonly termed springtoothecl barrows, and it has for its ob ect to provide a support that will contribute materially to the strength and consequent durability of this class of barrows. v

In the drawings,-Figure 1 is a to view of a spring'to'othed barrow equippe with our invention. Fig. 2 is a side elevation of a harrow tooth fitted with the tooth-holding attachment shown in Fig. 4. Fig. 3 is a perspective view in detailshowingthe holder mounted on a harrow with and without the toothin position. Fig. 4.- is a perspective view of the barrow tooth holder.

Like numerals of reference represent like parts'in both drawing and description.

The spring tooth type of barrow shown in Fig. l embracesa beam 1, vertically adjustable handles 2,- parallel supporting bars 3 3 and 4 4 on the two sides of the beam 1 angu'larly adjustable with the beam 1 by means ot the rods 5.-5 and the perforations in the plate 7 bolted to the under side of the beam 1,"handle braces 8, teeth 9, bolts 10 and nuts ll securing the 'teeth '9 and holding plates 12 secured by the bolts 13 and nuts 14. The tooth holding plates 12 and the method of mounting them with relation to the supporting bars 3-4' and the teeth '9 being the same for all, a description of one will suihcel The plate 12 comprises a middle fiat portion 16, perforated suitably to engage rotatably the side of the bolt 13, and end members 17 bent perpendicularly to av face of the middle portion 16 perforated with slots lS'rcgistering with each other suitably to receive and engage slidably the horizontal portion or shank of the tooth 9 and support it from the point of engagement to and including its operative extremity when the latter is raised from the ground.

The plate 12 is rotatably sccurcd to the Specification of Letters Patent.

Patented Sept. 14. 1909. 309. Serial No. 496.155.

3 by means of the bolt 13 and the nut 1%. The extremity of the straight portion or shank of the tooth is passed through the slots 1.8 and carried forward to the front supporting bar 3 where for lat.-

it is-secureu era-l pivotal movement by the bolt 10 and the nut, 11.

Connecting bars 20 of equal dimensions are pivotally secured one on each side of the barrow to the upper surface of the outer extremities of the adjustable supporting arms 3 3 and 44 by means of the vertical bolts 10 and 13. The-function of the connecting bars 20 is to communicate the adjusting movements from the bars 3 and 4 to the bars 3 and 4 and secure simultaneous parallel adjustment of the teeth 9 on both sides of thebeam 1.

The holding plate pivoted as it is to the rear adjustable bar secures as free movement to the barrow tooth as if the barrow tooth itself were pivoted at that point. In this manner the full strength of the harrow tooth is preserved without weakening it by a pivot bolt.

Having described our invention what we claim is 1. In a spring-tooth barrow, a barrow tooth holder including a plate, means of suspending said plate in, oscillatory engagement with a supporting member of the harrow. means of slidably engaging the. shank of said tooth, and means of supporting an extremity of the tooth. I

2. In a spring-tooth hajrrow, a barrow tooth holder embracing a. plate adapted to engage for oscillatory movement the head and adjacent side portions of a bolt carried by a supporting member of the barrow,

means of slidably engaging the shank of a tooth and means of supporting an extremity of the tooth.

3. In a spring-tooth barrow, a'harrow tooth ,holder embracing a plate, means of suspending said plate. in osc1llatoryv engagement with a supporting member of a harrpw,

parallel members of said plate provided with slots adapted to slidably engage, the shank of the tooth, and meansof supporting an eX- tremity of the tooth.

4. In a spring-tooth harrow, a harrow tooth holder embracing a plate, means "of suspending said plate in oscillatory engagement with a supporting member of a harrow a means of slidably engaging the shank of a tooth and parallel members provided with slots adapted to support the operative extremity and adjacent portion of the tooth.

5. In a spring-tooth harrow, the combination of a harrow tooth holder embracing a plate provided with a central perforation, parallel members provided with registering slots, a bolt engaging said perforation, a harrow tooth engaging said slots, the said harrow tooth provided with a perforation in the extremity of its shank, and a pivot bolt engaging said perforation in the said shank and the front adjusting arm of the harrow.

In a spring-tooth barrow, the combination of a harrow tooth holder including a plate provided with a central perforation, parallel members perpendicular to a face of said plate and provided with registering slots, the shank of a harrow tooth engaging said slots, thesaid shank of the tooth being provided with a perforation said harrow adapted to engage a pivot, a connecting bar provided with a perforation at its opposite extremities adapted to receive pivots; a pivot engaging the perforation and a portion of an adjacent surface of one side of the plate, a perforation in the rear supporting bar and the perforation at one extremity of the connecting bar, tion in the shank of the said harrow tooth, a perforation in the forward adjustable supporting bar, and a perforationin the other extremity of said connecting bar.

In testimony that we claim the foregoing as our own, We have hereto affixed our signatures in the presence of two witnesses.

MERRIOTT A; JACKSON. JOHN A. BRISTOW.

Witnesses ROYAL R. WATKINS, EARL J ONES.

and a pivot engaging a perforav 

